Corchorus olitorius stem as corrosion inhibitor on mild steel in sulphuric acid

The corrosion inhibition of mild steel in 0.5M H2SO4 solution was studied in the presence of Corchorus olitorius stem extract as inhibitor. Phytochemical analysis results confirmed the presence of organic constituents such as Alkaloids, Tannins, Glycosides, Saponins and Flavonoids which made the Corchorus olitorius stem extract act as a good inhibitor. The highest inhibition efficiency as observed from the experimental design was 93.29%, with process levels of 4 days, temperature: 60 degrees C and inhibitor concentration: 1.0 g/L respectively. The optimal process levels were: 4.11 days, temperature: 48.92 degrees C and inhibitor concentration: 1.16 g/L respectively, which gave an inhibition efficiency of 94.34%. The result from the Scanning Electron Micrographs showed that via the validated experiment, a more passive layer of film was formed on the surface of the coupon, confirming the high efficiency of the Corchorus olitorius extract's inhibiting role in corrosion prevention.

Automated summary

Using Corchorus olitorius stem extract as inhibitor can effectively reduce the corrosion rate of mild steel in 0.5M H2SO4 solution, with organic constituents such as Alkaloids, Tannins, Glycosides, Saponins and Flavonoids. The optimized process levels were found to be 4.11 days of processing time, temperature of 48.92 degrees Celsius, and inhibitor concentration of 1.16 g/L, resulting in an inhibition efficiency of 94.34%.